Alot of companyes is having afilliate programs.
Afilliate, is a way of getting other people to recommend your product.
Some companyes like partner-ads, have a couple of hundred companyes they at making affiliate links for and you can apply to a Company that a making afiliate marketing for alot of other companyes or some companyes are making their own program, like Bornprettystore .
When you have signed up to make afilliate marketing eigther for a single Company, og for one of the big companyes ther are helping alot other. You can start to make afilliate links. When other people then click at the link you are making, you will be abel to get money for the click, to send people to the other webpage. or some give you Money when the people you send to their pages buy a product.
So if you have a fashion/beauty blog, you migth have a favorite webshop, check out if they have a affiliate program, it is easy to recomend products you love, dont ask people to buy thing that you dont like, just to earn money.